|Publication number||US7326342 B2|
|Application number||US 10/940,002|
|Publication date||Feb 5, 2008|
|Filing date||Sep 13, 2004|
|Priority date||Sep 13, 2004|
|Also published as||CA2579195A1, CA2579195C, EP1817093A1, EP1817093B1, US8197686, US8628663, US20060054547, US20080073262, US20120223003, WO2006031651A1|
|Publication number||10940002, 940002, US 7326342 B2, US 7326342B2, US-B2-7326342, US7326342 B2, US7326342B2|
|Inventors||Thomas C. Richmond, Steven M. Todd, Kenneth W. Stirn|
|Original Assignee||Baldwin Filters, Inc.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (41), Referenced by (15), Classifications (12), Legal Events (3)|
|External Links: USPTO, USPTO Assignment, Espacenet|
The present invention generally relates to filters and their components and more particularly relates to filter cartridges and end caps therefore which are configured to engage flow control valves in filter housings.
The present invention relates to keyed fuel filter cartridges for a fuel filter housing which has a keyed latch shut-off valve as shown for example in U.S. Pat. Nos. 6,495,042 and 6,550,000, the entire disclosures of which are hereby incorporated by reference. As disclosed generally in these patents, stepped keys are provided in a recess formed in the bottom end cap of a fuel filter cartridge. Each of the stepped keys includes a valve actuation portion and a latch actuation portion, whereby the keys are used to unlock a latched device and move a valve element and uncover a fuel flow port in a standpipe of a valve housing. It is known that these fuel filter cartridges are periodically replaced from time to time, but the fuel filter housing is permanent and typically reused. In these applications the fuel filter cartridge is pulled from the fuel filter housing which returns the valve to the closed position and the latch mechanism to the lock position. As a result, when a new filter cartridge is installed there is a need to be able to again unlatch the latch device and then move the valve element to uncover the opening in the standpipe. The present invention relates to a fuel filter cartridge and end cap which may be used and applied to such fuel filter housings as disclosed in the '042 and '000 patents referenced above, or that may have other application.
One aspect of the present invention is directed toward a fuel filter. The fuel filter includes a tube of filter media surrounding a longitudinal axis. A first end cap is placed on the first end of the tube of filtering media. The first end cap defines a first annular trough that is filled with potting compound to connect and seal the first end cap to the tube of filtering media. The first end cap defines a first central opening surrounding the longitudinal axis. A second end cap is located on the second end of the tube of filtering media. The second end cap includes an outer annular skirt portion, an inner annular skirt port and a disc portion therebetween. The second end cap defines a second annular trough along the disc portion between the skirt portions which has potting compound therein which connects and seals the first end cap to the tube of filtering media. The second end cap defines a second central opening which surrounds the longitudinal axis. Unlike the prior art, a plurality of keys are located on the disc portion and project axially from the disc portion in a direction away from the filtering media. The keys are arranged in an annular array surrounding the axis.
Another aspect of the present invention is directed toward an end cap for such a fuel filter cartridge. The end cap includes an outer annular skirt portion, an inner annular skirt portion and a disc portion therebetween. An annular trough is formed along the disc portion between the skirt portions on an underside of the end cap. A central opening is formed into the disc portion and surrounds the longitudinal axis. A plurality of keys are located on the disc portion and project axially from the disc portion. These keys are arranged in an annular array which surrounds the axis.
According to a different aspect and different embodiment of the present invention, a fuel filter comprises a tube of filtering media and first and second end caps placed upon opposing ends of the tube of filtering media. One of the end caps includes a cylindrical recess structure. Located in the recess structure is a first plurality of keys which project in the recess in an annular array and a second plurality of keys projecting in the recess in an annular array which are of a different characteristic than the first plurality of keys.
Other aspects, objectives and advantages of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
While the invention will be described in connection with certain preferred embodiments, there is no intent to limit it to those embodiments. On the contrary, the intent is to cover all alternatives, modifications and equivalents as included within the spirit and scope of the invention as defined by the appended claims.
Referring to the first embodiment of
With an exemplary operating environment for the present embodiment being understood, attention will now be directed toward the fuel filter cartridge 10. The fuel filter cartridge 10 generally includes a cylindrical tube of filtering media 30 that is concentric around the longitudinal axis 16. The tube of filtering media 30 may comprise a cylindrical ring of pleated filter paper, or may comprise other suitable filtering media. A perforated metal or plastic central support tube 32 may be provided concentrically inside the filtering media 30 to provide for radial support to the filtering media 30. The support tube 32 provides support for the media 30 when fuel is flowing radially inward through the filtering media 30.
At the top end of the filter cartridge 10 with the given orientation shown in
Turning to the bottom side of the filter cartridge 10, a bottom end cap 50 is provided. The bottom end cap 50 may be comprised of two separate component plastic parts including a generally plate-shaped member 52 and a generally ring-shaped member 54 which are assembled together as shown. One method for assembling the two members 52 and 54 together is a snap-lock connection in which snap tabs 56 projecting from one of the members 54 is snapped onto corresponding structure on the other member 52 to form the bottom end cap 50.
The bottom end cap 50 once assembled includes an outer annular skirt 58, an inner skirt 60 and a generally planar disc portion 62 therebetween. The combination of these structural portions provides an annular trough 64 which is received onto the bottom end of the filtering media 30 and connected and sealed thereto by potting compound 66. The inner periphery of the disc portion 62 defines a central opening 68 which may be recessed into the filtering media 30 as indicted via the inner skirt 60. The inner skirt 60 extends axially inward and terminates in a radially inward extending bottom wall 70 to form a generally cylindrical recess 72. The bottom wall 70 is generally planar in nature and extends radially inward toward a further central opening 74 that is of a smaller diameter than the outer central opening 68. The bottom wall 70 in this embodiment is used as the valve actuation means as shown in
Since the valve 22 cannot be actuated without first removing the protective latch device 20 as shown in
As shown in the figures, the keys 82 project radially inward past the outer central opening 68 in a cantilever manner such that gaps 84 are formed between adjacent keys to provide suitable clearance for use with the associated standpipe and valve/latch mechanism. The keys are arranged and spaced to provide means for releasing the latch device 20 of the flow control valve 22 in the filter housing. The keys 82 are configured and spaced relative to the valve actuating bottom wall 70 so as to compliment the configuration of the latch device 20 and valve 22 of the fuel filter housing. To achieve this, the keys 82 only extend partially radially inward and short of the diameter of the inner central opening 74. With this configuration, there is no longer a requirement that the outer face of the keys be stepped. Instead as shown the keys 82 may have an outer surface 88 which is relatively straight in the radial direction. The keys 82 may also be elevated slightly by a raised annular plateau portion 90 which is formed into the disc portion 62 of the plate-shaped member 52. This raised plateau portion 90 also provides along the inward side a recess area to receive a radial projection of the ring-shaped member 54 and thereby provide a flat underside surface for the annular trough 64 to better ensure connection and sealing between the bottom end cap 50 and the filtering media 30 via the potting compound 66.
Turning to the second embodiment of the present invention shown in
Turning to a third embodiment of the present invention, with reference to
A fourth embodiment of a fuel filter cartridge 310 is shown in
All references, including publications, patent applications, and patents, cited herein are hereby incorporated by reference to the same extent as if each reference were individually and specifically indicated to be incorporated by reference and were set forth in its entirety herein.
The use of the terms “a” and “an” and “the” and similar referents in the context of describing the invention (especially in the context of the following claims) is to be construed to cover both the singular and the plural, unless otherwise indicated herein or clearly contradicted by context. The terms “comprising,” “having,” “including,” and “containing” are to be construed as open-ended terms (i.e., meaning “including, but not limited to,”) unless otherwise noted. Recitation of ranges of values herein are merely intended to serve as a shorthand method of referring individually to each separate value falling within the range, unless otherwise indicated herein, and each separate value is incorporated into the specification as if it were individually recited herein. All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g., “such as”) provided herein, is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention unless otherwise claimed. No language in the specification should be construed as indicating any non-claimed element as essential to the practice of the invention.
Preferred embodiments of this invention are described herein, including the best mode known to the inventors for carrying out the invention. Variations of those preferred embodiments may become apparent to those of ordinary skill in the art upon reading the foregoing description. The inventors expect skilled artisans to employ such variations as appropriate, and the inventors intend for the invention to be practiced otherwise than as specifically described herein. Accordingly, this invention includes all modifications and equivalents of the subject matter recited in the claims appended hereto as permitted by applicable law. Moreover, any combination of the above-described elements in all possible variations thereof is encompassed by the invention unless otherwise indicated herein or otherwise clearly contradicted by context.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US3567023||Jul 11, 1969||Mar 2, 1971||Gen Motors Corp||Valved filter support tube|
|US3726403||Feb 8, 1971||Apr 10, 1973||Hastings Mfg Co||Dual flow, spin-on filter|
|US3931011||Nov 19, 1973||Jan 6, 1976||Racor Industries, Inc.||Fluid separation apparatus|
|US4502307||Feb 15, 1983||Mar 5, 1985||Rudolf Grunewald||Wire bending machine|
|US4581135||Aug 19, 1983||Apr 8, 1986||Henry C. Kova||Self-cleaning fluid filter with a drain|
|US4619764||Jun 19, 1984||Oct 28, 1986||Parker-Hannifin Corporation||Repelling-action filter unit and assembly|
|US4836923||Dec 23, 1987||Jun 6, 1989||Parker Hannifin Corporation||Cartridge and cover assembly for fluid filters|
|US4935127||Apr 19, 1988||Jun 19, 1990||Facet Enterprises, Inc.||Pressure relief valve assembly with plastic, one-piece valve|
|US5035797||Feb 14, 1990||Jul 30, 1991||Stanadyne Automotive Corp.||Key system for filter assembly|
|US5049269||Jun 8, 1989||Sep 17, 1991||Sunstrand Corporation||Filter assembly with spring loaded valve|
|US5186829||Aug 16, 1991||Feb 16, 1993||Stanadyne Automotive Corp.||Fuel filter key system|
|US5486288||Apr 12, 1994||Jan 23, 1996||Elkay Manufacturing Company||Mounting head with safety shut-off valve for replaceable filter cartridge|
|US5538626||Jul 15, 1994||Jul 23, 1996||Ing, Walter Hengst Gmbh & Co. Kg||Liquid filter|
|US5690816||Nov 13, 1995||Nov 25, 1997||Dana Corporation||Anti-drain back/pressure relieved filter cartridges|
|US5753107||Aug 8, 1996||May 19, 1998||Wtc Ecomaster Corporation||Dripless purification manifold and cartridge|
|US5766463||Jul 18, 1996||Jun 16, 1998||Stanadyne Automotive Corp.||Fuel filter cartridge|
|US5770054||Mar 15, 1996||Jun 23, 1998||Firma Ing. Walter Hengst Gmbh & Co. Kg||Fluid filter with filter bypass valve and sealing surface on filter element side|
|US5826854||Jun 7, 1996||Oct 27, 1998||Amana Refrigeration, Inc.||Fluid routing system|
|US5837137||Aug 21, 1996||Nov 17, 1998||Stanadyne Automotive Corp.||Base/cartridge location and key system for fuel filter assembly|
|US5888384||Oct 27, 1997||Mar 30, 1999||Filterwerk Mann & Hummel Gmbh||Liquid filter|
|US5922199||Aug 8, 1995||Jul 13, 1999||Parker Hannifin Corporation||Double pass fuel filter assembly|
|US6006924 *||May 14, 1997||Dec 28, 1999||Pti Technologies, Inc.||Multi-media filtration system with reusable and demountable filter cartridge|
|US6096199||Oct 31, 1996||Aug 1, 2000||Dana Corporation||Oil filter cartridge with temperature sensitive bypass valve|
|US6139738||Mar 10, 1999||Oct 31, 2000||Parker-Hannifin Corporation||Cartridge filter with integrated threading having anti-rotation feature|
|US6146527||Apr 21, 1998||Nov 14, 2000||Parker-Hannifin Corporation||Spin-on filter cartridge with replaceable element|
|US6174438||Oct 15, 1999||Jan 16, 2001||Parker-Hannifin Corporation||Dual pass fuel filter assembly and element therefor|
|US6189513||Jun 3, 1999||Feb 20, 2001||Ford Global Technologies, Inc.||Fuel transfer and conditioning unit for automotive vehicle|
|US6235194||Mar 8, 2000||May 22, 2001||Parker-Hannifin Corporation||Recharge and filter assembly with replaceable cartridge|
|US6248236||Jun 25, 1999||Jun 19, 2001||Parker-Hannifin Corporation||Double pass fuel filter assembly|
|US6475379||May 15, 2001||Nov 5, 2002||Parker-Hannifin Corporation||Recharge and filter cartridge|
|US6495042||Dec 3, 1999||Dec 17, 2002||Parker-Hannifin Corporation||Filter cartridge for a fuel filter having a keyed latch shut-off valve|
|US6506302||Feb 16, 2001||Jan 14, 2003||Stanadyne Corporation||Key system for ecological filter cartridge and element|
|US6554139||Jun 1, 2000||Apr 29, 2003||Parker-Hannifin Corporation||Extension and locking assembly for dripless element, and container therefore|
|US6555000||Mar 30, 2001||Apr 29, 2003||Parker-Hannifin Corporation||Fuel filter with bypass valve|
|DE4243217A1||Dec 19, 1992||Jun 23, 1994||Knecht Filterwerke Gmbh||Automotive engine oil filter arranged axially unsupported with internal stiffening ring|
|EP0880987A1||May 14, 1998||Dec 2, 1998||PTI Technologies, Inc.||Filtration unit|
|WO1995013468A1||Oct 18, 1994||May 18, 1995||Parker Hannifin Corp||Fuel filter|
|WO2001031329A1 *||Oct 26, 2000||May 3, 2001||Benoit Couet||Deposition monitoring system|
|WO2002040525A1||Jun 29, 2001||May 23, 2002||Mao Yumin||A novel polypeptide-homo zinc finger protein 18.92 and polynucleotide encoding said polypeptide|
|WO2002078816A1||Mar 28, 2002||Oct 10, 2002||Donaldson Co Inc||Bowl-cartridge filter having interlock mechanism and methods|
|WO2006112853A1||May 6, 2005||Oct 26, 2006||Donaldson Co Inc||Liquid filter arrangemet and method|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US7662284||Jun 16, 2005||Feb 16, 2010||Donaldson Company, Inc.||Liquid filter arrangement and methods|
|US7955502||Dec 22, 2009||Jun 7, 2011||Donaldson Company, Inc.||Liquid filter arrangement and methods|
|US8066790 *||Mar 13, 2008||Nov 29, 2011||3M Innovative Properties Company||Fluid filter cartridge and housing|
|US8146751 *||Nov 25, 2008||Apr 3, 2012||Cummins Filtration Ip, Inc.||Filter element with threaded top endplate|
|US8167966 *||Apr 7, 2008||May 1, 2012||Cummins Filtration Ip, Inc.||Replaceable filter cartridge with removal feature|
|US8197686||Dec 4, 2007||Jun 12, 2012||Baldwin Filters, Inc.||Fuel filter cartridge and keyed end cap|
|US8236176||Apr 29, 2009||Aug 7, 2012||Parker-Hannifin Corporation||Replaceable filter cartridge|
|US8292984 *||Jul 15, 2008||Oct 23, 2012||Donaldson Company, Inc.||Air cleaner arrangments with end support for cartridge; components; and, methods|
|US8440079||Jun 6, 2011||May 14, 2013||Donaldson Company, Inc.||Liquid filter arrangements and methods|
|US8628663||May 14, 2012||Jan 14, 2014||Baldwin Filters, Inc.||Fuel filter cartridge and keyed end cap|
|US8714142||Jul 31, 2008||May 6, 2014||Donaldson Company, Inc.||Crankcase ventilation filter assembly; components; and methods|
|US8999163||Apr 24, 2009||Apr 7, 2015||Donaldson Company, Inc.||Top load liquid filter assembly, system and methods|
|US9120041||May 13, 2013||Sep 1, 2015||Donaldson Company, Inc.||Liquid filter arrangement and methods|
|US9132367||Nov 3, 2010||Sep 15, 2015||Donaldson Company, Inc.||Liquid filter assembly, system and methods|
|US20100044295 *||Apr 25, 2008||Feb 25, 2010||Donaldson Co., Inc.||Liquid filter, assembly, system, and methods|
|U.S. Classification||210/234, 210/450, 210/235, 210/493.2|
|Cooperative Classification||B01D2201/291, B01D2201/4084, B01D2201/4046, B01D29/21, B01D35/153|
|European Classification||B01D29/21, B01D35/153|
|Nov 22, 2004||AS||Assignment|
Owner name: BALDWIN FILTERS, INC., NEBRASKA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:RICHMOND, THOMAS C.;TODD, STEVEN M.;STIRN, KENNETH W.;REEL/FRAME:016002/0251
Effective date: 20040915
|Aug 5, 2011||FPAY||Fee payment|
Year of fee payment: 4
|Aug 5, 2015||FPAY||Fee payment|
Year of fee payment: 8